Welcome to YT! I'm so happy that your baby is still with you and overcame her ordeal with the livershunt. As far as the separation anxiety - there are techniques that you can try - do a search for "separation anxiety" and it will take you to a bunch of threads posted by other people with this same problem and you can find some solutions there I'm sure!
Good luck!
(you could always get another puppy to keep her company
)